<script>
import * as echarts from 'echarts'
export default {
  name: 'DrawPieImage',
  props: {
    title: {
      require: true,
      type: String
    },
    data: {
      require: true,
      type: Array
    }
  },
  methods: {
    draw() {
      let chart = echarts.init(this.$refs.pieBox)
      let option = {
        title: {
          text: this.title,
          left: 'center'
        },
        tooltip: {
          trigger: 'item'
        },
        legend: {
          orient: 'vertical',
          left: 'left'
        },
        series: [
          {
            name: this.title,
            type: 'pie',
            radius: '50%',
            data: this.data,
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      }

      chart.setOption(option)
    }
  },
  watch: {
    data: {
      immediate: true,
      deep: true,
      handler() {
        if (this.data.length > 0) this.draw()
      }
    }
  }
}
</script>
<template>
  <div ref="pieBox"></div>
</template>